Accession Number : AD0461352


Title :   NEW HIGH TEMPERATURE INFRARED TRANSMITTING GLASSES.


Descriptive Note : Semiannual technical summary rept. no. 1, 1 May-31 Oct 62.


Corporate Author : TEXAS INSTRUMENTS INC DALLAS


Report Date : 31 Oct 1962


Pagination or Media Count : 20


Abstract : The glass forming compositions of the siliconantimony-sulfur and silicon-antimony-selenium systems were established. Glasses of the SiSb-S system had high softening points but were rapidly attacked by the atmosphere and showed little or no IR transmission. The Si-Sb-Se glasses were much more resistant to atmospheric attack, had high softening points (up to 500 C) and good IR transmission. However, absorption bands were found at 9.5 and 12 microns, right in the middle of the desired 8-14 micron region. From reflectivity measurements, the index of refraction of the Si-Sb-Se glasses was found to vary from 2 to 3.5, depending upon composition. No glass composition was found in these two systems that could be used as a high temperature window material for the 8-14 micron atmospheric window. The next system that will be studied will be a phosphorous glass of either silicon or germanium. (Author)


Descriptors :   *INFRARED OPTICAL MATERIALS , INFRARED WINDOWS , INFRARED WINDOWS , OPTICAL GLASS , HEAT RESISTANT GLASS , CHALCOGENS , SILICON , ANTIMONY , SULFUR , SELENIUM , ARSENIC , TELLURIUM , INFRARED SPECTRA , REFRACTIVE INDEX , STABILITY


Distribution Statement : APPROVED FOR PUBLIC RELEASE